Optical Fingerprint Authentication Composite Device
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Solution Overview
Problem
Current authentication methods in information terminal devices, such as smartphones and laptops, face challenges in providing a high security level to prevent unauthorized use, as they can be compromised by malicious users obtaining passwords or biometric data improperly, and may unlock devices unintentionally, such as during sleep.
Innovation Solution
A composite device incorporating a control portion, detection portion, authentication portion, and memory portion that detects fingerprints and compares them to registered data, ensuring the device remains locked unless authenticated, using a touch-sensitive display with light-emitting and light-receiving elements for enhanced security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional authentication methods (passwords, biometric data) are used, then device accessibility is improved, but security level deteriorates due to risk of compromise by malicious users
Solution Approach 1:
The patent replaces traditional mechanical/password-based authentication with optical field-based fingerprint authentication. The touch-sensitive display uses light-emitting elements to illuminate the fingerprint and light-receiving elements to detect the reflected light, creating an optical authentication system that eliminates the need for passwords and traditional biometric sensors.
Solution Approach 2:
The touch-sensitive display is designed to perform multiple functions simultaneously: displaying visual information, detecting touch input, and capturing fingerprint data for authentication. This multi-functionality eliminates the need for separate authentication hardware, integrating security features into the display system itself.
2Reliability
If authentication processing is executed, then security level is improved, but device complexity increases due to additional processing requirements
Solution Approach 1:
The patent merges the authentication processing functionality into the existing display system. The control unit that manages display operations also handles fingerprint authentication by processing light signals from the light-receiving elements and comparing them with stored fingerprint data, eliminating the need for separate authentication hardware or complex processing systems.
3Measurement precision
If fingerprint detection is performed on touch-sensitive display, then authentication accuracy is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by positioning light-emitting and light-receiving elements at specific locations within the display matrix. Each pixel or group of pixels is configured with optical elements oriented to detect light reflected from the fingerprint at its specific location, allowing accurate fingerprint capture across the entire display surface without requiring ultra-precise manufacturing throughout the entire device.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a high-security authentication method that prevents unauthorized use by ensuring the device remains locked unless authenticated, thereby enhancing security and preventing accidental unlocking.
Implementation Method 1
the pixel include a light-emitting element and a light-receiving element
Implementation Method 2
a light-emitting element and a light-receiving element provided on the same plane
Implementation Method 3
a light-receiving element... provided on the same plane
Data Source
AI summary
A composite device with a high security level is provided. A composite device capable of inhibiting unauthorized use favorably is provided. The composite device includes a control portion, a detection portion, an authentication portion, and a memory portion. The detection portion has a function of detecting a touch and a function of obtaining first fingerprint data of a finger touching the detection portion. The authentication portion has a function of executing user authentication processing. The memory portion has a function of retaining second fingerprint data registered in advance. The control portion has a function of bringing a system into an unlocked state when the authentication portion authenticates a user and a function of comparing the first fingerprint data obtained by the detection portion and the second fingerprint data when the detection portion detects a touch, and bringing the system into a locked state in the case where those data do not match.